Pneumatic cushion.



,^. MAKE,

PNEUMATIC CUSHION.

APPucATmN man JUNE 24,1915.

1i n @394m \l 'ing members for utilizing the cus -ect of compressed air and app .pump and vaive stront1 i a" if votre .Cr rire www@ EERVENG LKE, OE WERT] errrerus-uname operaron specimen@ uf Leiters raient.

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Patented Dec., lifl.

Application led June 1915. Serial No. 36,10'.

To QZZ y1ro/"Lora, t may come Be it lmown that il? nvro A. Lann. a citizen of the United States5 and a. resident of the city of New Tilorlrf borough ofthe Bronx, in the county et Bronx and State or' New York, have inventer` a new and lmproved Pneumatic Cushion, of which. the iollowing is a full, clear, and exact description. l

This invention relates to cushioning devices and particularly to what are sometimes called shock absorbers for vehicles, and has for an object the provision or' an improved cushion construction that utilizes as the cushion medium.

Another object in riew is to improved cushioning device rifle an pr l elescopu .E

same to the springs of a rehiele.

A still further object in View is to provide a cushioning with a pair of telescoping; tubular sections a. eombined re for controlling the iiow of liquid used in 'the telescoping sections so as to produce the desired cushioningeffect.

in the accompanying* drawings: ure l is a` side view of pneumatiecushioning device embodying the invention; 2 is z. section through Fig. l approximately' on line 2 2; Fig. 3 is a section through Fig. 2 on line 3-3; Fig. l is a (letal fragmentary sectional. View through the upper part of one of the .telescopinfg sections shown in Fig. 2 illustrating an' intake plug; Fig. 5

is a. fragmentary side view ol the springs of an' automobile with an embodiment of the invention applied thereto. Referring to the accompanying d awmgs by numerals@ indicates the usual top spring of an automobile and Zthe bottom spring, the same formingy no part of the present invention but being the means to which the cushioning device embodying the invention is shown attached; Springl 2 is provided with a suitable eye which surrounds the piny or bolt 8 While pin 4f e'itends through a suitable eye arranged on spring l. ln order to reduce the friction to a mininnn'n, rollers 5 and 6 are mounted on the pins or bolts 3 and e. The pin 3 extends through head members 7 and 8, which head membershave.

rigidly secured thereto rods 9 and rods l0, which rods extend downwardly and through the imstanding' lugs ll and l2and=also thron-'hthe lugs 13,- 14', 15 and 16, respectively. rlie lower end of each of the rods 9 and 10 are provided With -some form of retaining means, as for instance, nuts 17. The projections or lugs 1l and l2 and' 13 and let aetas guides tor the moving parts of the device and as means for holding the moving parts connected With the'various rods 9 and 1Q.

The lugs 15 and 16 are projections from a base 18 which is provided with a threaded portion 19 and athreaded extension .20. 'lhe threaded portion 19 has screwedA thereon a tubular' member 2l, Which'itubular member may be of any desired length and which is preferably formed With a beveled upper edge 22, as clearly shown in Fig. 2. The threaded extension 20 has a tubular member- 23 threaded thereover, said tubular member beingprovided with a plurality of openings 24 whereby the oil or other luid 25 in the tubular member or chamber 21 may freely enter the tubular member 23. However, this entrance is' retarded by a Washer of leather or other suitable material 2G which is connected with projection 20 by a suitable thread, the same beimgr spaced from the. projection 20 by a spacing member. By this construction and arrangement. whenever there is an excessive pressure on the fluid 25 the same may enter the openings 24 and force itself past the Washer 2G into the body of the tubular member23 and finally out of the upper end. of the tube 23.

Arranged in tube 28 above Washer Q6 is a washer 27 which is connected with a plunger 28. Plunger 28 is rigidly secured to the top 29, which top has threaded thereon the tubular casings 30 and 31. The plunger' 28 is provided with a bore 32 registering;t with a bore 33. Bore extends to an inlet member 344 which inlet member is adapted to nori ally be provided with a cap 35 having a suitable vasher 362 Vilhen it is desired to insert air into the device, cap 35 is removed and apump is substituted. The air passes through passageway 33 and also through passageway 32 into'the tubular member inea-1,41@

a tubular member for' connecting said division'plate to the other o said casings, said ,tubular member extendingA from the lower casing to near the upper end of the upper casing, said tubular member being formed with openings near the lower end, a washer arranged in said tubular member above said openings whereby fluid in said lower casing may pass into said tubular member but cannot pass from said tubular member into the lower' casing, a piston rod extending from the upper end of the upper casing into said tubular member, a washer arranged on said piston rod facing in the same direction as the first mentioned washer, whereby the said washers, piston rod and tubular member will act as a pump for drawing .fluid from the lower casing and forcing thc same into the upper casin and means for directing air into'said tublilar member, saidair being adapted to pass by said second mentioned washer into the upper casing.

2. In an automatic cushioning device, upper and a lower casing, said casing telescoping, a supply of oil arranged in both of said casings, a tubular member extending from the bottom of the lower casing into the upper casing, a bottom member vconnected to said tubular member intermediate the length thereof, said tubular member having apertures adjacent the bottom, an upwardlj,Y facing washer `arranged in said tubular member above said apertures, a piston ere tending from the upper end 'of said upper casing into said tubular member, an up wardly facing washer connected to said piston whereby as the device is operated the upper washer will ict as the piston of the pump and draw the oil from the lower cas ing and force the samer into the upper casing, means for dire ting air into said upper casing,'and means or connecting the device to the operating parts of an automobile.

In a pneumatic cushioningdevice of the character described, a bottom member, a top member, tubular telescoping members connected with said bottom member andA said top member respectively, a piston connected with said bottom member and space therefrom, said piston including a tubular member extending from a point beyond said piston, a pluralitr of sliding bars connected with said bottoni member, means for conneet-ing said sliding bars with one spring of an automobile, and means tor connecting said top member with another spring of the automobile.

1l. In a pneumatic cushioning device of the character described, a bottom. member, a. tubular casing extending therefrom, a. top member, a tubular casing extending from said top member and te'iescopically fitting said lirst mentioned tubular casing, a pipe v extending upwardly from said bottom mein ber, said pipe having an aperture the bottom, a washer arranged in said pipe adj acont said aperture :for permitting matter to pass in one direction. through said pipe, a second washer arranged in said pipe for permitting matter to move in one direction through said pipe, a piston structure connected with said pipe and arranged to compress the air in the tubular member 4eX- tcnding from said top, means extending into said pipe and to a point below said second mentioned washer for directing air into said pipe, whereby said air may be forced into the casing connected with said top, a pair of rods connected with each side of said bottom, guiding lugs arranged on said top, said guiding lugs being formed with apertures through which said rods ext-end, means connected with the upper end of said rods for connecting the rods with one spring of an automobile, and lmeans connected with said guides to. connecting the guides with another spring oil the automobile, said guides being rigidly connected with said top.

5. ln a pneumatic cushioning device o1c the character described, a bottom, a tubular member extending from said bottom, a top, a tubular. member extending from said top and telescopically fitting within the first mentionedtubular member,I a pipe rigidly connected with said bottom and extending upwardly toward said top, said pipe' being open at the bottom and provided with an aperture adjacent the bottom, means for perinitting rluid to pass into said pipe through said opening and preventing Huid from ing` said pipe tosaid opening, an air guiding tube entendit into said' pipe, a flexible washer connected with said tube, said. washer permitting fluid to pass upwardly to the opening in said tube and preventing duid Yfrom passing in the opposite direction, a piston structlu'eronncctcd with said pipe, said piston structure including bearing and guiding member, a tlc-1, ble wat or and a clamping member for holding tube washer in place, said washer preventing fluid from passing from the casing connected with said top when the piston is moving toward said top, means for connecting said bottom with one ng of an automobile, and means for connec Ang said top with another spring oit said automobile,

6. In an automatic cushion of the character described, a bottom, a top, tubular members extending from said bottom and top respectively, tubular members tele-A scoping, a member connected with said bou tom and eqtending toward said tcp, a piston connected with said last mentioned meinber, said piston provided with a boaring uienvibcr, a flexible washer and a clamping member :for clamping the washer against the bearing member, an oil nliling arranged above said piston and within th tubular weg' extending from said top, 

